It is definitely too late to help this time around but this may useful in future. I am going to assume it was a "tree frog"....
Houses are very dry places and the greatest danger to a frog is dehydration, which, depending on the weather, can occur fairly rapidly. The smaller it is the faster it will dehydrate. So it needs access to water. Frogs also feel vulnerable if out in the open with nowhere to hide. So you need to supply cover at the same time.
If you can remove the tank lid (and any other occupants to temporary housing) it might come back to the tank. I would look at putting something like a recycle crate or baby's bath filled with some bushy broad-leaved pot plants and a few centimetres of water, on the floor of the room in which it escaped.
Block exits under doors with towels. Look behind and in the folds of hanging curtains, behind and under cupboards – dark places, as these usually mean moisture in nature. Check out the room an hour or so after dark. If it is a male, play a recording of another male to see if it responds. You can try this during the day. If it is a secure spot it will likely respond. Otherwise try again in the dark.
Lastly, it always helps to inform of the species, the sex (if known) and the size when posting.
Having said all that, did you happen to get it back?
Blue